Voltmeter-switch.



PATENTED JAN. 2a, 1906 G. N. EASTMAN.

.VOLTMBTER SWITCH. I AP-I LiOATmN FILED APR. 26. 1905.

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, COMPANY, OF UHiGAGO, ILLlNUlS, A C(JitlCRAllUN OF ILLINOIS.

' VQLTMETER SWlTGH.

Tool/Z whom if may concern:

Be it known that I, Gnonon N. EASTMAN, a citizen or the United States, residing at Chicego, in the county ofUook and State of lllione of a number of circuits in use to enable its voltage to be denoted on the meter.

The object of my invention is to provide a novel construction of multiple switch in the class referred to, whereby as a primarily important advantage the voitnieter pointer shall not be iiijuriously effected by the pus sage of the contact-brushes from one circuit to the other and the wear on the voltnn-itcr shall be accordingly reduced and whereby the meter may be rapid! y read and other advantages ere nfi'orded, as hereinafter explnined.

Itch-wring to the accompanying drawings, Figure 1 is s View in side elevation of my in:-

proved switch, showing the marble panel on which it is mounted in section; Fig. .2, n longitudinnl vertical sectionthrough the switch, taken at the hue 2 on Flg. 3 and vlewed in the direction of the arrow: 1 i 3 a face view of the switch, presenting only the died and its imlex-1lingcr end opernting-lnuidlc; Fig. 4, u section tel cnnt the line l on Fig. 1 and viewed in the direction of the arrow; Fig. 5, c section token at the line 5 on Fig. 1 and viewed in the dircction of the arrow, nnd Fig. 6 s section tnltcn at the line 5 on Fig. 1 and viewed in the direction or the arrow.

The body of the switch comprises four looks A A and B it or insulated or insulating nniteriul provided with binding-posts on their edges connected with contacts projecting from their hires to be engaged by rotury brushes, as licrciinrftcr dcsrribcd. The blocks ere preferably square, of uniform size, and composed of insulating material, vulcanized iibcr being the material .1 prefer to use, and they are. connected together and spaced apart in pnirs, the blocks A und B forming one pair and the blocks A B another pair. In front of the block A n inetni spider-plate a, and behind the block B is n. sinulnr piste I).

Specification of Letters Eatent.

Application filed April 26, 1905. Serial No. 257,523.

Patented Jan. 23, 1906.

' Rods c are passed through the four corner portions of the spider-plums and those of the blocks between them, the end blocks being spaced from the respective plates by bosses b b and the blocks being spaced npin't by sleevesections d d on the rods which are instened at their rear projecting ends by nuts I). lforwnrd of the spider-plate a is another similar plate a, spaced from it by bosses 1;, into which the forward ends of the rods c are screwed, and from the face of the piste a project-s a. stud e for a purpose hereinafter ex nlnined.

()n the inner face of the block A is n circulnr series of contacts], of which ten are provided, shown in Fig. 6, though the number may be greater or less, these contacts engnging s. metal ring g, let inlo the surface of the block and bcing conncctcd by n wire 11 with n bii1dingpost i on the upper edge of the block. A similar series of contnctsj" is provided on the corresponding ace oi the block A to ongnge o ring thereon. (Not shown, but like the ring g and similarly commuted by a. wire with n'biinli1ig-post'i on the upper edge of the block A.) it is'l'rom the binding-posts 2', and i that connection is made with n voltmeter. (Not shown.)

On the ace ol" the block 3 which opposes the contmit-c uippcrl hire of the blorli A is provided :1 rorrcspoiuling; circular series of ten contacts A, ouch umncctcd byn wire hextending on the opposite i'uce oi the block (and therefore shown dotted in Fig. 5) to n diil'erent binding-post III, those holding-posts being disposed about the edges of the block, osrinn'esentcd, and u metal ring n. lot into the face of the block, surrounds the ('onlncls /i: for connection by wires with dill'crcnt biiiding-posts, us represented at o, o, and o'-', to olcctricnl contacts A", (but nniy be out of list. or not in circuit with others that are in (iicuit, for the purpose hereinafter c. ;plnincd. ()n the ince of the block 13 which opposes the contncteqnipped hire of the block A is provided a. series of contacts Ir, like the contncts 1's and similarly. arranged, can-h being connected by a wire (not shown, but like the wire I) on the opposite face of tho block with n diilerent binding-post or, disposed like the binding-posts m the conlncts It" being also surronnx ed, like those on the block B, by n which tho multiple switch s1 metal ring, like the ring l2, oozmectcsl wick different binding posts in cor'respondonc with the clescriloed conncctimls between the binding-posts m with thcrlng n tlzrougla. tho medium of wires, of which two arc sl'zowzz o o in Fig. l. A shaft C is journs-led in tho spides-platos h, 11-, and (fund carries bctwccn tho blocks A 1 53 o o .1. of insulating material, which may be samo tl'w t corcgaosiog the tlccl-zs, and t op oosits sides of the head psojoct g, armed, prcfcm'oly, of spa gage the contacts j and slmi't, the brushes colo elect-mo through the head, as tween the blocks Aficm B" a head 19', like tnc hcstl q prcvic m brushes g "g', coxmcctcci, through the head, by a pin 1', as in the case of the brush-es g, and adapted to engage the contacts j" is by rotct in the shaft.

and beyond an cxtcrzmll n which extends way tlwough panel F at an o; to be at its outer end o it l mtcroqllvtbsecded sleeve E tors/1cm. jog oo switch on the cool, clmopmg moons sllowo being cdaptcd by the he dcd sleeve .331 to be a shod to camels of G1 wont thick messes. .118 stud enters a recess :1 the back oi the panel to hold the. switch device against turning in opcroting it.

The shaft D passes at its forward through the base of a (licLolstc G, rig fastened in place, as by screws, one of is shown at at in 2, and provided w h a semicircular slot u above which a arranged the dial-numbers ranging from 3. ll to correspond with tho combo! t cod 'dlv trol. In the slot is seated at {5 through which to View the cm L or 11-2, on winch the different circuits are :ootctl with reference to the numbers on the dial, the card orcarcls being held in place a back rcmcva-bly fastened: to the. row: side of "the dictplate. is the index-finger 011 a sleeve 1), mounted co t-he forward projecting end the shaft D, to which it is scouted, as by a sot-screw v, and the sleeve carries a handle H, by moons of which to turn the operatingshaft.

of contccts contacts? is, wlnch through t 1c respective ofiuli )osts'i m and i m cooocct with the volts: ruzmmals also clrcult correspondor 0 L. t ne inlicstiontc which the lnclors o er ool'nts. thc'ycbv inclzujlifn voltmezct c D 11452: in that cir uit and enabling; it to indicate hos turning the 1 by cngcgln l: to move tho mchcsfiom cots they connect to 033m. to bring the vo tmeter ,on with so one oft-i1 5 cl t, go. to co tcstctl, of which tho te /spa contacts and. l? Bonn tho terminals, the i12 clicstor, in. oc-i by the dial and inclcxfingcr, shm Lg when the handle has boon turned S llllitlr, tly for to make the desired concoction. the oaring afforded by tho twotoooe relation bstwocn the gear D and. pinion *3" the movement of the brushes from Ci? cult to GlFCGlt is made: sickly by c slight lmntllc that too pointer of the mmxctl but slightly, sincethe tamed by the brushes in traversing 12 dead Dc-tween contacts is in tent to omit the inertia of the clots points)? to lac overcome 'sufliciently to e. l c it to nor for coougll to it-or strike i" v ,.-utment at the or we t co -po1nt on the voltmeter.

iviorecvontllc rapidity with which the transfor of the brushes from circuit to clrcwt may be made cocci-as too reading of the. 'voltagcs co the voltmeter to be performed expoii tlously.

Whore certain of the. contacts 011' the switch devlccarc not in use as circuit-terminals, the rings it come into use. stood, when the brushes are swept across such lead contacts the lecd space between use thc index-finger tops-int.

the piniim As will be under-t live-circuit terminal contacts is accordingly 7 lncz'eitsed, .ct the time of movemeot of the brushes from circuit to circuit is augmfitfiil, with the result that the movement of the volt-ntmter-pcinter, is undesirably increased. To obviate this result, I connect the dead contacts withccljacent circuits through the medium of the rings by leading Wires lTom the binding-gems of it pair of livc 'ccmtacts to tho rings and lcading from the lcttorothcr wires to the pair-0f binding-posts of the respcctivc dead contacts, thereby including the latter in the circuit ternzinctcil by the live contacts, with the effect procti caliy of avoiding increase in tho dead space to ho traversed by the biilSllQB.

The described construction of my improved switch also renders it Y6! compact and :ulapts it to be readily attached to and mzncvcd from the. sw1tchboardmncl. it here to engage opposite contacts.

' sistence.

the number of circuits to be controlled is larger or smaller than ten, the dimensions of the blocks for accommodating the different number of contacts may be greater or smaller accordin ly.

It Will e noted, as it particularly desirable feature of my improvement, that the contacts on each block-face are separated each from the other by deed spaces and that the contact-arms of each brush spread resiliently I Thus when a. brush is turned it entirely clears the contacts it is caused to leave by the turning and passes through the dead. space to the next pair of contacts without encountering frictional re- The brush in engaging a. pair of contacts is lrictionslly held by them to retain the brush positively and indicate to the sense of feeling of the operator when contact is made.

l/Vhet I claim as new, and desire to secure by Letters Patent, is-

1. In a multiple voltmeter-switch, the corn- .binetion of blocks provided on corresponding feces with series of contacts, with s hincl-' ing-post,for connection with e voltmeter, on each said block connected with the contacts thereon, blocks alternating with end spaced apart from said first-named blocks end provided on corresponding feces withseries of circuit terminal contacts connected with binding-posts, and s'rotsry shaft carrying brushes in the spaces between successive blocks, for the purpose set forth. 7

2. In a multiple voltrnetenswitch, the corn binstion of blocks provided on correspond inglaces with series of contacts, with e hinding-post, for connection with e voltmeter, on each said block connected with the contacts thereon, blocks elterneting with and 53' need apart from said first-named blocks on provided on corresponding feces Witl'i series of circuit terminal contacts connected with binding-posts, a. rotary shaft oerryin brushes in the spaces between successive looks, a

dial having an index-finger,encl means {or turning seid finger and shaft, for the purpose set forth.

3. In a multiple voltmeter sWitch having sirculor series of ClICUllD-"i-Qfl1'llll&l and voltmeter-terminal contacts, respectively, on the opposing feces of blocks, the combination with said blocks of a rotary lorush-csrryiru shaft to engage the contacts between said opposing faces, an operetingehsft end means for speeding the movement of the brushshaft relative to that oi'the operating-shaft by turning the letter, comprising a car connection between said shafts pro ucing aroster extent of movement of the brushes "y srelativel lesser extent of turning the operating-she. t, for the purpose set forth.

4. In a multiple voltmeter-switch having circular series ,of circuit-terminal and voltloinetion with sold blocks faces with series of meter-terminal contacts respectively ed the opposing feces of successive blocks, the com- 0? ft rotary shaft carrying brushes to engage the contacts between said opposing faces, dial, on operating-shsft, en index-finger actuated by the operating-shaft, and means for speeding the movement of the brush-shaft relative to that of the operating-shaft by turning the letter, comprising e gesr connection between said shafts reducing a roster extent of movement 0 the brushes liy a relatively lesser e);- tent of turning the operating-shaft, for the purpose set forth.

5. In a multiple voltmeter-switch, the con1- binetion of series of circuitterminsl end voltmeter terminal contacts, s moveble brush device for connecting opposite ssid contaots, and means for connecthu st will a deed-circuit-ter1ninsl contact wits it live one, for the purpose set forth.

.6. In e multiple voltmeter-switch, the coinhination oi blocks provided on corresponding contacts, with e hinding-post, for connection with e voltmeter, on each said block connected with the contacts thereon, blocks alternating with and spaced apart from said first-named blocks and pro vided on corresponding feces with series of circuit terminal contacts connected with binding-posts and with means for connecting dilierent saidcontacts on their respective: supporting-clocks, end at rotsry shaft currynig crosses in the spaces between successive blocks, for the purpose set forth.

7 In a mulitple voltmeter-switch, the oomhinstion of blocks provided on corresponding faces with series oi contacts, with e oinolingpost, for connection with s' voltmeter, on

each said block connected with the contacts ryin brushes in the spaces between successive locks, for the urpose set forth.

8. A multiple vo tmetenswitoh, comprising, in combination with a freme,,blocks pro vided on corresponding faces with circular series of contacts, with s binding-post, 'ror connection with evoltrneter, on each said block connected with the contacts thereon, blocks alternating with and spaced sport from said first-named blocks and provided on corresponding faces with series of circuit-terminal contacts connected with binding-posts, plates between which said blocks are confined, a

rotary shaft carryin brushes in. the spaces between successive blocks and a pinion, a, rotery opereting-sheift carrying a gear-wheel meshing with Sfi-ld pinion and passing through headed siem'a engaging said dim-mad aleew at 119 front side 0? 5M and to clamp the switah thmeon, a dis a? t; g from side Q? in *1 mmi, and an hideyihlgmprovided wiih a enum Lam a. fwwardpimie nbuui the 0;; rating-shaft -m'ough sand pansi-upenmg,

Landie and suppm'ied on said operating ififi, 30rbhg purpuse set forth. 

